In probability, problems involving arrangements are called combinations or permutations. The difference between both is the order or repetition. If you want to arrange the letters regardless of the order and that there must be no repetition, that is combination. Otherwise, it is permutation. Therefore, the problem of arrange A, B, C, D, and E is a combination problem.
In combination, the number of ways of arranging 'r' items out of 'n' items is determined using n!/r!(n-r)!. In this case, you want to arrange all 5 letters. So, r=n=5. Therefore, 5!/5!(505)! = 5!/0!=5!/1. It is simply equal to 5! or 120 ways.
Answer:
area= 1/2(6)(4)= 3*4=12
Step-by-step explanation:
area of a triangle is 1/2 the base times the height
To determine the extent of how many times greater is the
number of bacteria in petri dish A than petri dish B, we simply have to take the
ratio of the two.
1.75 x 10^18 / 6.25 x 10^15 = 280
So the bacteria in petri dish A is 280 times larger.
In scientific notation:
<span>2.8 x 10^2</span>
Answer:
circumference of the circle= 2πr
2πr= 52π
r= 52/2= 26 inches
diameter = 2r= 2×26=52 inches
option B
